log.error("Server returned no hash selection");
            return false;
        }

        PreauthIntegrityNegotiateContext rpc = null;
        for (final NegotiateContextRequest rnc : req.getNegotiateContexts()) {
            if (rnc instanceof PreauthIntegrityNegotiateContext) {
                rpc = (PreauthIntegrityNegotiateContext) rnc;
            }
        }

    class InterfaceImplementationTests {

        @Test
        @DisplayName("Should implement NegotiateContextRequest interface")
        void testImplementsNegotiateContextRequest() {
            PreauthIntegrityNegotiateContext context = new PreauthIntegrityNegotiateContext();

            assertTrue(context instanceof NegotiateContextRequest);
        }

        @Test